how much bud will i get from 6x 105w compact fuorescents..

[psteve]

Depends only on the proper equipment and efficient use thereof.
1 gram per watt per flower cycle or 0.5g per watt per month (most strains=8 weeks).
This equation only applies to PROPER HPS lighting under ideal conditions.
To find ideal conditions, look at the logs of growers who know their chops.

Exactly.
Of course, +/- 1 gram per watt is just a ball park estimate. There is no way to predict how much actual bud will come from a given plant, even under the most controlled conditions.